* {
    margin: 0;
    padding: 0;
}

.app {
    header {
        background-color: red;
        height: 44px;
        width: 100%;
        position: fixed;
        top: 0;
        left: 0;
        display: flex;
        justify-content: center;
        align-items: center;
        a {
            width: 57px;
            height: 28px;
            border: .0156rem solid black;
            background-color: white;
            border-radius: .7813rem 0rem 0rem .7813rem;
            text-align: center;
            text-decoration: none;
        }
        input {
            border: .0156rem solid black;
            border-radius: 0rem .7813rem .7813rem 0rem;
            height: 24px;
            width: calc(100% - 200px);
        }
    }
    main {
        padding: 44px 0;
        .banner {
            img {
                width: 100%;
            }
        }
        nav {
            .icon {
                width: 1em;
                height: 1em;
                vertical-align: -0.15em;
                fill: currentColor;
                overflow: hidden;
            }
            display: flex;
            a {
                text-decoration: none;
                // 平分一行
                flex: 1;
                height: 50px;
                flex-direction: column;
                align-items: center;
                display: flex;
                svg {
                    text-align: center;
                    font-size: 30px;
                }
                span {
                    font-size: 14px;
                }
            }
        }
        .content {
            // 多列
            column-count: 4;
            // 列间距
            column-gap: 5px;
            border: 1px solid #e6e6e6;
            div {
                // 断点
                break-inside: avoid;
                // 底部间距
                margin-bottom: 5px;
                img {
                    width: 100%;
                    border-radius: 50%;
                    height: 15%;
                }
                p {
                    font: 100 12px/20px "";
                    color: #303030;
                    padding: 2px 10px;
                    text-align: center;
                }
                .two {
                    color: #e6e6e6;
                }
            }
        }
    }
    footer {
        background-color: #fff;
        height: 1.6406rem;
        width: 100%;
        position: fixed;
        bottom: 0;
        left: 0;
        display: flex;
        border-top: 1px solid #d6d6d6;
        a {
            flex: 1;
            display: flex;
            text-decoration: none;
            width: .7813rem;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: #d6d6d6;
            em {
                font-size: .3906rem;
            }
            span {
                font-size: .2188rem;
            }
        }
        a:nth-child(1) {
            color: red;
        }
        a:hover {
            color: red;
        }
    }
}